Accessory for bubble machine



FIG. 1 is a front, right, and top perspective view of an accessory for bubble machine showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines depict portions of the accessory for bubble machine that form no part of the claimed design. 

CLAIM The ornamental design for an accessory for bubble machine, as shown and described. 